Changing power tubes in a RV100 mkI

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mandala-studio
New Member
Posts: 5
Joined: Sat May 19, 2018 11:36 am

Changing power tubes in a RV100 mkI

Post by mandala-studio » Fri Jun 21, 2019 2:18 pm

Hi guys,

If I wanted to put KT88 or 6550 in a RV100, do I simply select the kind of tube in the rear switch or is it necessary to also change the bias? What would happen if I didn't? just curious btw (would love to try different tubes but don't really want to pay a tech to do it)

northernguitarguy
Tiny Terror
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Joined: Tue May 21, 2019 9:59 am
Location: Ontario, Canada

Re: Changing power tubes in a RV100 mkI

Post by northernguitarguy » Fri Jun 21, 2019 2:53 pm

You SHOULD be getting it biased when you swap power tubes. Running too hot is bad for the tubes, too cold is bad for the tone.

Les Paul Lover
Duke of Orange
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Joined: Tue Aug 18, 2009 9:08 am
Location: Derby, England

Re: Changing power tubes in a RV100 mkI

Post by Les Paul Lover » Sat Jun 22, 2019 10:42 pm

Furthermore, the valve selection switch is not always..... to be trusted. As in, it works for the valve types most times, but depending on the matched quartet you fit in, you may well find the perfect bias on one side or the other regardless of valve type.

But yeah, always get it biased.
Ant

Orange Gear: RV50 MKI, R30, AD15, AD5, PPC212
Past Orange: Orange AD30TC Combo, Tiny Terror

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